Shortened footnote and citation:
{{sfn | Magnusson | Ehrhardt | 2007 | p=}}

* {{cite book | last=Magnusson | first=Magnus | last2=Ehrhardt | first2=Harald | title=Die Wikinger | publisher=Albatros | publication-place=Düsseldorf | date=2007 | isbn=978-3-491-96188-3 | language=de}}


Named reference:
<ref name="v434">{{cite book | last=Magnusson | first=Magnus | last2=Ehrhardt | first2=Harald | title=Die Wikinger | publisher=Albatros | publication-place=Düsseldorf | date=2007 | isbn=978-3-491-96188-3 | language=de | page=}}</ref>